Actually, it's already difficult. The government procures thousands of both military and non military assets from China today.
The days of only buy in America military parts are gone forever.
The Chinese have issues with manufacturing quality in spite of strick military contractual specifications.
Eriks is a good choice, but what they have today made in USA may be made in China tomorrow, so you always ask that they go ahead and pull the part and then ask the question when you call. From the military perspective now days, a NSN is a NSN irregardless of where it is made. The quality may vary when it is not supposed to. If enough failures can be reported to the buyer when the part is active, the parts will be pulled from inventory.